再生混凝土框架结构抗震性能试验研究

Seismic Behavior Experiment of Recycled Concrete Frame Structures

为了研究再生混凝土框架结构的抗震性能,进行了2个1/2.5缩尺的两层两跨再生混凝土框架结构的低周反复荷载试验研究,一个为全再生混凝土框架结构,另一个为一层为普通混凝土、二层为再生混凝土框架结构.在试验基础上,对其承载力、刚度及其退化过程、滞回特性、位移延性、耗能能力、破坏形态与破坏机制等进行了分析.研究表明:2个框架的承载力较为接近,刚度退化规律相同,延性均满足抗震要求,二者破坏机制均为'强柱弱梁'型;再生混凝土框架可用于多层结构或高层结构上部楼层.

To analyze the seismic performance of recycled concrete frame structures,experiments on two 1/2.5 scale two-story two-bay recycled concrete frames under cyclic loading action were conducted.One of the specimens was made from recycled concrete;and the other is made from natural concrete in the first floor and recycled concrete in the second floor.Load-carrying capacity,stiffness and its deterioration process,hysteretic loop,displacement ductility,energy dissipation,failure patterns and failure mechanisms of the specimens are analyzed on the basis of the experiments.Studies show that the load-carrying capacity of the two frame specimens is similar,stiffness deterioration processes are the same,ductility of both the two specimens can meet the seismic requirements,and their failure patterns fit the principle of ＇strong column and weak beam＇.Recycled concrete can be used in multi-storey frame structures or the top part of high-rise frame structures.